因式分解(x²+5)²-16x²
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因式分解(x²+5)²-16x²
因式分解(x²+5)²-16x²
因式分解(x²+5)²-16x²
(x²+5)²-16x²
=(x²+5)²-(4x)²
=(x²+5+4x)(x²+5x-4)
=(x+4)(x+1)(x²+5x-4)
(x²+5)²-16x²
=﹙x²+5-4x﹚﹙x²+5+4x﹚
=﹙x²-4x+5﹚﹙x²+4x+5﹚